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LMZ14203H: Minimize trace length to the FB pin

Part Number: LMZ14203H
Other Parts Discussed in Thread: LMZ14203

Hi Team, 

Good day. We need your clarification on this query for our customer. 

In Section 10.1, point number 3, of the LMZ14203 datasheet, it is mentioned that 'Both feedback resistors, RFBT and RFBB, and the feed forward capacitor CFF, should be close to the FB pin. Since the FB node is high impedance, maintain the copper area as small as possible. The trace are from RFBT, RFBB, and CFF should be routed away from the body of the LMZ14203 to minimize noise.'

We got confused between the part that the feedback components should be close to the FB Pin, and the trace from these components should be routed away from the body. If I keep the components close to the FB Pin it is obvious that the traces from these components will be near the body of the LMZ14203.

Thank you for the support. 

Best regards,

Jonathan

  • Hi Jonathan,

    It could be that what it means that away from the body of the DAP so that it does not cut off the thermal path for the device.

    The key point is to keep the FB trace short and the components near the pin as you can see on the picture below.

    Thanks

    -Arief